41

Challenge 41 - Write Your Own HTTP(S) Load Tester

This challenge corresponds to the 41^st part of the Coding Challenges series by John Crickett https://codingchallenges.fyi/challenges/challenge-load-tester.

Description

The objective of the challenge is to build a HTTP(s) Load Tester that can query a given address and return some important stats such as Total Request Time, Time to First Byte, Time to Last Byte.

Usage

You can use the ts-node tool to run the command line version of the NTP Client as follows:

npx ts-node <path/to/index.ts> -u <url> [-n <number-of-requests>] [-c <concurrency>]

Options

• -u <url>: The URL on which load testing needs to be performed.

• -n <number-of-requests>: The number of requests sent to the server. This are sent in series. Default = 10.

• -c <concurrency>: The number of concurrent requests to send. Default = 1.

Examples

# Load test https://google.com with 10 requests and 10 concurrency
npx ts-node <path-to-index.ts> -u https://google.com -n 10 -c 10

Description

• customer_request.ts: A helper function which calculates some stats while doing a network GET request. The code is inspired from https://gabrieleromanato.name/nodejs-get-the-time-to-first-byte-ttfb-of-a-website.

• load_tester.ts: The main load tester implementation.

Run tests

To run the tests for the Load Tester, go to the root directory of this repository and run the following command:

npm test src/41/